表面接枝GAP改性超细铝粉的制备与性能(英文)  

Properties of Ultrafine Aluminum Powders Modified by Facile Grafting with Glycidyl Azide Polymer

作　　者：刘小兵[1] 潘丽萍[1] 张建虎[1] 巩飞艳[1] 

机构地区：[1]中国工程物理研究院化工材料研究所,四川绵阳621999

出　　处：《含能材料》2015年第8期813-816,共4页Chinese Journal of Energetic Materials

基　　金：National Natural Science Foundation of China(11402238,1006350);Science and Technology Innovation Fund of Institute of Chemical Material(KJC X-201303)

摘　　要：用二异氰酸酯作桥,通过—OH和—NCO基团间的连串缩合反应,经过接枝含能端羟基叠氮缩水甘油醚（GAP）,改性了超细（1-2μm）铝粉表面。研究了接枝GAP铝粉的表面性质,与含氟粘结剂的相容性及70℃水中稳定性。结果表明,接枝前后的铝粉表面静态水滴接触角分别为0-25.7°和109.9°,表面接枝后,铝粉表面性质从亲水改变为疏水。接枝GAP的铝粉与含氟粘结剂有更好的相容性。在70℃水中15 min后,未经处理的铝粉有39.8%的活性铝被氧化,而经过GAP接枝改性的铝粉在70℃水中60 min后只有1.4%的活性铝被氧化,显示接枝GAP的铝粉可有效保护铝粉在苛刻的热水条件下不被氧化。The ultrafine aluminum powders with diameter of 1-2 μm were surface grafted by energetic glycidyl azide polymer（GAP） using diisocyanate as bridge via consecutive condensation reactions between-OH and-N=C=O groups.The surface properties,compatibility with fluorine polymeric binders as well as resistance to water oxidation of the prepared GAP-grafted aluminium powders were studied.Results show that the static water contact angle of surface of aluminum powders before and after grafting is 0- 25.7°and 109.9°,respectively.The surface property of aluminum powders is changed from hydrophilic to hydrophobic after surface grafting.The GAP grafted aluminium powders have better compatibility with fluorine polymeric binders.Moreover,The stability tests for aluminum powders were conducted in water at 70℃.39.8%（mass fraction） of active aluminum are oxidized after 15 min,for the untreated fresh aluminium powders.Only 1.4%of active aluminum are oxidized after 60 min for GAP-grafted aluminum powders,revealing that grafting with GAP can effectively protect the aluminum powders under harsh hydrothermal conditions.

关 键 词：含能材料 超细铝粉 端羟基叠氮缩水甘油醚(GAP) 表面接枝 

分 类 号：TQ133.1[化学工程—无机化工] TQ560.1